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Diffstat (limited to 'arch/x86/include/asm/sev-common.h')
-rw-r--r--arch/x86/include/asm/sev-common.h104
1 files changed, 95 insertions, 9 deletions
diff --git a/arch/x86/include/asm/sev-common.h b/arch/x86/include/asm/sev-common.h
index b8357d6ecd47..0020d77a0800 100644
--- a/arch/x86/include/asm/sev-common.h
+++ b/arch/x86/include/asm/sev-common.h
@@ -54,8 +54,18 @@
(((unsigned long)fn) << 32))
/* AP Reset Hold */
-#define GHCB_MSR_AP_RESET_HOLD_REQ 0x006
-#define GHCB_MSR_AP_RESET_HOLD_RESP 0x007
+#define GHCB_MSR_AP_RESET_HOLD_REQ 0x006
+#define GHCB_MSR_AP_RESET_HOLD_RESP 0x007
+#define GHCB_MSR_AP_RESET_HOLD_RESULT_POS 12
+#define GHCB_MSR_AP_RESET_HOLD_RESULT_MASK GENMASK_ULL(51, 0)
+
+/* Preferred GHCB GPA Request */
+#define GHCB_MSR_PREF_GPA_REQ 0x010
+#define GHCB_MSR_GPA_VALUE_POS 12
+#define GHCB_MSR_GPA_VALUE_MASK GENMASK_ULL(51, 0)
+
+#define GHCB_MSR_PREF_GPA_RESP 0x011
+#define GHCB_MSR_PREF_GPA_NONE 0xfffffffffffff
/* GHCB GPA Register */
#define GHCB_MSR_REG_GPA_REQ 0x012
@@ -91,23 +101,61 @@ enum psc_op {
/* GHCBData[11:0] */ \
GHCB_MSR_PSC_REQ)
+#define GHCB_MSR_PSC_REQ_TO_GFN(msr) (((msr) & GENMASK_ULL(51, 12)) >> 12)
+#define GHCB_MSR_PSC_REQ_TO_OP(msr) (((msr) & GENMASK_ULL(55, 52)) >> 52)
+
#define GHCB_MSR_PSC_RESP 0x015
#define GHCB_MSR_PSC_RESP_VAL(val) \
/* GHCBData[63:32] */ \
(((u64)(val) & GENMASK_ULL(63, 32)) >> 32)
+/* Set highest bit as a generic error response */
+#define GHCB_MSR_PSC_RESP_ERROR (BIT_ULL(63) | GHCB_MSR_PSC_RESP)
+
+/* GHCB Run at VMPL Request/Response */
+#define GHCB_MSR_VMPL_REQ 0x016
+#define GHCB_MSR_VMPL_REQ_LEVEL(v) \
+ /* GHCBData[39:32] */ \
+ ((((u64)(v) & GENMASK_ULL(7, 0)) << 32) | \
+ /* GHCBDdata[11:0] */ \
+ GHCB_MSR_VMPL_REQ)
+
+#define GHCB_MSR_VMPL_RESP 0x017
+#define GHCB_MSR_VMPL_RESP_VAL(v) \
+ /* GHCBData[63:32] */ \
+ (((u64)(v) & GENMASK_ULL(63, 32)) >> 32)
+
/* GHCB Hypervisor Feature Request/Response */
#define GHCB_MSR_HV_FT_REQ 0x080
#define GHCB_MSR_HV_FT_RESP 0x081
+#define GHCB_MSR_HV_FT_POS 12
+#define GHCB_MSR_HV_FT_MASK GENMASK_ULL(51, 0)
#define GHCB_MSR_HV_FT_RESP_VAL(v) \
/* GHCBData[63:12] */ \
(((u64)(v) & GENMASK_ULL(63, 12)) >> 12)
#define GHCB_HV_FT_SNP BIT_ULL(0)
#define GHCB_HV_FT_SNP_AP_CREATION BIT_ULL(1)
+#define GHCB_HV_FT_SNP_MULTI_VMPL BIT_ULL(5)
+
+/*
+ * SNP Page State Change NAE event
+ * The VMGEXIT_PSC_MAX_ENTRY determines the size of the PSC structure, which
+ * is a local stack variable in set_pages_state(). Do not increase this value
+ * without evaluating the impact to stack usage.
+ *
+ * Use VMGEXIT_PSC_MAX_COUNT in cases where the actual GHCB-defined max value
+ * is needed, such as when processing GHCB requests on the hypervisor side.
+ */
+#define VMGEXIT_PSC_MAX_ENTRY 64
+#define VMGEXIT_PSC_MAX_COUNT 253
-/* SNP Page State Change NAE event */
-#define VMGEXIT_PSC_MAX_ENTRY 253
+#define VMGEXIT_PSC_ERROR_GENERIC (0x100UL << 32)
+#define VMGEXIT_PSC_ERROR_INVALID_HDR ((1UL << 32) | 1)
+#define VMGEXIT_PSC_ERROR_INVALID_ENTRY ((1UL << 32) | 2)
+
+#define VMGEXIT_PSC_OP_PRIVATE 1
+#define VMGEXIT_PSC_OP_SHARED 2
struct psc_hdr {
u16 cur_entry;
@@ -128,9 +176,6 @@ struct snp_psc_desc {
struct psc_entry entries[VMGEXIT_PSC_MAX_ENTRY];
} __packed;
-/* Guest message request error code */
-#define SNP_GUEST_REQ_INVALID_LEN BIT_ULL(32)
-
#define GHCB_MSR_TERM_REQ 0x100
#define GHCB_MSR_TERM_REASON_SET_POS 12
#define GHCB_MSR_TERM_REASON_SET_MASK 0xf
@@ -157,12 +202,26 @@ struct snp_psc_desc {
#define GHCB_TERM_NOT_VMPL0 3 /* SNP guest is not running at VMPL-0 */
#define GHCB_TERM_CPUID 4 /* CPUID-validation failure */
#define GHCB_TERM_CPUID_HV 5 /* CPUID failure during hypervisor fallback */
+#define GHCB_TERM_SECRETS_PAGE 6 /* Secrets page failure */
+#define GHCB_TERM_NO_SVSM 7 /* SVSM is not advertised in the secrets page */
+#define GHCB_TERM_SVSM_VMPL0 8 /* SVSM is present but has set VMPL to 0 */
+#define GHCB_TERM_SVSM_CAA 9 /* SVSM is present but CAA is not page aligned */
+#define GHCB_TERM_SECURE_TSC 10 /* Secure TSC initialization failed */
+#define GHCB_TERM_SVSM_CA_REMAP_FAIL 11 /* SVSM is present but CA could not be remapped */
#define GHCB_RESP_CODE(v) ((v) & GHCB_MSR_INFO_MASK)
/*
- * Error codes related to GHCB input that can be communicated back to the guest
- * by setting the lower 32-bits of the GHCB SW_EXITINFO1 field to 2.
+ * GHCB-defined return codes that are communicated back to the guest via
+ * SW_EXITINFO1.
+ */
+#define GHCB_HV_RESP_NO_ACTION 0
+#define GHCB_HV_RESP_ISSUE_EXCEPTION 1
+#define GHCB_HV_RESP_MALFORMED_INPUT 2
+
+/*
+ * GHCB-defined sub-error codes for malformed input (see above) that are
+ * communicated back to the guest via SW_EXITINFO2[31:0].
*/
#define GHCB_ERR_NOT_REGISTERED 1
#define GHCB_ERR_INVALID_USAGE 2
@@ -171,4 +230,31 @@ struct snp_psc_desc {
#define GHCB_ERR_INVALID_INPUT 5
#define GHCB_ERR_INVALID_EVENT 6
+struct sev_config {
+ __u64 debug : 1,
+
+ /*
+ * Indicates when the per-CPU GHCB has been created and registered
+ * and thus can be used by the BSP instead of the early boot GHCB.
+ *
+ * For APs, the per-CPU GHCB is created before they are started
+ * and registered upon startup, so this flag can be used globally
+ * for the BSP and APs.
+ */
+ ghcbs_initialized : 1,
+
+ /*
+ * Indicates when the per-CPU SVSM CA is to be used instead of the
+ * boot SVSM CA.
+ *
+ * For APs, the per-CPU SVSM CA is created as part of the AP
+ * bringup, so this flag can be used globally for the BSP and APs.
+ */
+ use_cas : 1,
+
+ __reserved : 61;
+};
+
+extern struct sev_config sev_cfg;
+
#endif